Alastair, thanks for the video. A couple of years ago, the topic of tropy caused a great resonance in Russia. It appeared in the southern regions of the country. However, I haven't heard anything about him this year. Tropi is very fast, he does not have a forese stage like varroa. (the stage when the tick has to spend some time on an adult bee) therefore, it reproduces more quickly. this tick lives almost always in the brood. he lives 72 hours without brood. The fight against it takes place with the help of isolation of queens and that there would be no closed brood. treatment is carried out with oxalic acid. Unfortunately, it has not been studied much and there is quite a lot of contradictory information about it...